Find cheap flights from Denver to the United Kingdom

Find cheap flights from Denver to the United Kingdom

Search hundreds of travel sites at once for deals on flights to the United Kingdom

Round-trip
Economy
Denver (DEN)
United Kingdom
Mon 6/14
Mon 6/21
Any month
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Good to know

Low season

OctoberBest time to beat the crowds with an average 5% drop in price.

High season

JuneMost popular time to fly with an average 11% increase in price.

Average price round-trip

$841(avg. price over the last 2 weeks)

Good deal round-trip

$458or less

Good deal one-way

$245or less

Top tips for finding cheap flights to the United Kingdom

  • Looking for a cheap flight? 25% of our users found tickets from Denver to the United Kingdom for the following prices or less: to London $277 one-way - $560 round-trip
  • Book at least 3 weeks before departure in order to get a below-average price.
  • High season is considered to be January, November and December. The cheapest month to fly to the United Kingdom is January.
  • On average*, there is no price difference when choosing to fly in the morning or the evening on this flight route.
*Average of the lowest prices shown in KAYAK’s search results for departures within the next 30 days

FAQs - booking United Kingdom flights

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Top 4 airlines serving Denver Intl to United Kingdom

Scores according to KAYAK customer reviews

7.7
WestJet
Overall score based on 8,986 reviews
8.1
Boarding
7.7
Comfort
8.5
Crew
7.1
Entertainment
7.1
Food
Airline reviews

Cons: "Minor point. They boarded the plane very early. We got to the gate 1/2 hour before departure, and were almost the last ones to board."

Pros: "The plane was nice and quiet, and the crew was lovely."
Cons: "It was so cold!!"

Pros: "I did not make it on the flight as the time was given was 5:35 and the flight left at 4:00."
Cons: "I was not given correct information and being a very novice traveller did not check the information."

Pros: "Crew were very caring. Seats were OK"

Pros: "Did not fly. But delayed by a while"

Cons: "Tv in the seat to make the long flight pass more quickly."

Pros: "Comfort, timing. Customer Service!"
Cons: "Technically problems with lightning on board."

Pros: "Crew were great, service was spot on."
Cons: "Plane was old, seat didn't recline, no tv screens in front of seats, temperature was freezing (but in fairness I was at the emergency exit) and worst of all NO MEAL?? ON A NINE HOUR FLIGHT? Arrived very hungry."

Pros: "Boarding went well. Although it was a full flight, they asked for volunteers to check in hand luggage (free of charge) I did, trying to help. But once I picked up my luggage and got to destination point, I noticed that 2 small items (gifts for family) had been pilfered. Not happy and will not volunteer to help again."
Cons: "No food on plane, no entertainment,( unless you download the app) Above pilfered items"

Pros: "Neriande (who issued the boarding passes & took checked bags) and her colleague At the check in desk were amazing - actually going behind the scenes to find a gate checked bag that had been wrongly named and was headed for Toronto when we were headed to LONDON GATWICK"
Cons: "Faulty weather radar on a stormy evening cancelled our WestJet PREMIUM ECONOMY flight. After deplaning and waiting for all passengers without checked bags to be rebooked, we eventually were on our way by car from LGA to JFK airport to meet a British Airways ECONOMY flight with only minutes to spare"

Cons: "On time"

Pros: "Excellent all round. Good price. Nice seats. Excellent staff. Good boarding and disembarking. Highly recommended."
Cons: "It does not have free food and entertainment, but for the price this is acceptable."

Pros: "Good service. And snacks served"

Cons: "The food was extremely mediocre for an $18 meal."

Pros: "Staff were helpful and smiling. Good value"
Cons: "We needed a better choice of food"

Pros: "Friendly and helpful staff. Boarded and got off quickly. Clean airplane."
Cons: "I felt cramped in my emergency exit seat, especially having a larger size person sit next to me. My seat was not comfortable. Being tall provides no advantages on westjet. Had to look down at my phone the whole time for entertainment, neck hurt. Wont fly again"

Cons: "Plane seemed older and less leg room for a 6’4” guy. No TVs or monitors to track flight info."

Pros: "Kind helpful staff"
Cons: "That you have to pay for entertainment and food on long haul flights"

Pros: "The low cost"
Cons: "That which comes with low cost, you get what you pay for"

Pros: "Loved WestJet! They are the best airline, always super friendly"

Pros: "staff on airline great"
Cons: "Lost my luggage hopefully I’ll get that tomorrow. Airline charged me 70 pounds for that. Staff at customer service were not helpful at all."

Pros: "Great staff. Fast boarding and deplaning."

Pros: "Hi. I actually am glad that the company is following up because I was having a hard time finding an email to contact. I actually came to kayak to book my ticket for Friday to go to London however when I got to the airport it says it was for Monday. Because I had to be at London the next day for a wedding i had to buy another ticket for almost 1000. I also couldn’t contact u so I’m emailing now. I didn’t get on the plane for west jet because I am already in London. I also have a screen shot that shows me that my flight details were for Friday however another email shows me that it’s for Monday. Even the workers at th airport were confused and felt strongly bad for me. I would like a full refund as well. Thank you. Please contact back. 416806-6530 or email me at sarapascual@hotmail.ca"

Pros: "It was a clean plane and a pleasant enough flight."
Cons: "I was in the window seat. The guy in the middle seat spread out so much he was pushing me against the side fo the plane. Really uncomfortable."

Cons: "Our original flight was cancelled due to WestJet reasons (plane was not safe to fly) the following evening the flight was supposed to depart at 7pm we didn’t take off until 10:37 pm causing an arrival of 940AM into London instead of 7:23AM primarily because the crew they chose for this new flight was coming from Montreal so we had to wait for them to arrive."

Pros: "Staff was good"

Pros: "Crew was friendly."
Cons: "Lack of maintenance. Seats did not recline, seat in front of me was broken. No reading lights available. One washroom became inoperable. Just showing a lack of maintenance or cost saving measures until new planes are delivered. Not a great impression for a carrier striving to compete against Air Canada. I would say they are competing with Air Transat."

Cons: "Big 4 hour delay caused that we missed another flight in London"

Pros: "We survived"
Cons: "On an 8 hour flight there’s no complimentary meal. I paid for a meal and it was worse than free plane food and starved for the rest of the trip. The chairs were horribly uncomfortable with no lower back support and we were not even given pillows and blankets. There was also no free entertainment. I rented a tablet and had it taken away an hour before landing while I was in the middle of a movie. I might have been ok with that if the flight attendant had politely asked for it back rather than rudely waving and pointing while I stared at her blankly trying to figure out what she wanted. Next time I’ll pay a bit more for an airline that respects its passengers and our comfort."

Pros: "Excellent Flight to London"
Cons: "Typical Econofare - pay piece meal for everything including a checked bag."

Pros: "Free upgrade and gate check!"
Cons: "No checked bags or meals for economy passengers"

Cons: "Pre-ordered meals are costlier than those purchased on board. The crew explains it by saying that they give some extra food just before landing, in lieu of that but what they give is too meagre and its not the customers choice."

Cons: "My ticket/reservation was not found by WestJet. I had to buy a new ticket. Flight Network or Emirates screwed up. I will need you and them to reemburse me. Please investigate."

Pros: "Landed 10 minutes early. Good landing in tough conditions"

Pros: "Very cheerful and friendly crew. Made the journey very enjoyable."
Cons: "Nothing"

Pros: "Comfort, friendliness and ease of travel with Westjet"
Cons: "Can't think of anything"

Pros: "Basics of chips or pretzels as one food offering"

Pros: "Friendly, polite crew. Well organized boarding"

Pros: "comfortable seats friendly crew"
Cons: "no entertainment system, fee for renting tablet not enough room in overhead no complimentary food or drink service"

Pros: "Only problem is my flight didnt have screens and you had to pay for a tablet. I get screens on my flights to Edmonton and Sask for work with Westjet all the time but on a long flight to London they're majorly lacking. A basic meal over a 9.5 hour flight should be included as well."
Cons: "1 for usb charging ports though. I still love Westjet but different priorities for International flights should a no brainer."

Pros: "Helpful polite staff. Many great movies and tv shows to select from."
Cons: "Trying to sleep in an uncomfortable, small, non reclining seat."

Pros: "The flight is decently cheap"
Cons: "Everything else is not really pleasant for a long distance travel. I've never felt more uncomfortable in my life during a flight. But i suppose you get what you paid for."

Pros: "food was good"
Cons: "Delays in connection flight, arrival gate and departure are far away and no help from airlines."

Pros: "the entertainment system was incredible."
Cons: "It was a very long flight-- including a meal in the ticket would have made it more enjoyable."

Pros: "Boarding was quick and easy, and the gate attendant was quite friendly."
Cons: "Very rude crew members; delay leaving YVR. Instead of being honest and upfront about having to leave an HOUR later--and also lying by saying that we'd be flying into Gatwick in only 8.5 hours as opposed to 9.5--they made us wait in our seats while the craft supposedly waited for food to be loaded. The best line was, "Our plane will be landed an hour earlier! But because London doesn't like it when we land early, we're going to wait here for a while on the tarmac so we make it there on time.""

Cons: "You have to download an app to watch movies/tv. There is no food served (transatlantic flight!) unless purchased 48 hours beforehand."

Pros: "Low cost, supportive seating"
Cons: "Meals are extra Arrived a bit early and had to wait about 15 min for someone to attach the gate"

Cons: "Plane needs to be upgraded, don't charge for meals or baggage"

Pros: "the price"
Cons: "they left late"

Cons: "They did not have hamburgers but when I called about seat reservation I was told I had order a hamburger but they weren’t even on the menu."

Pros: "Reasonable fares. Good baggage accommodations. Denver to Iceland direct. Nice flight staff. The flight attendant pointed out the people who were awake the northern lights which was definitely the highlight of my trip!"
Cons: "Seats small. Surprised no meals unless purchased. But didn’t matter too much I ate before the flight left. And it was nice to have something to purchase if needed. It was confusing where I could purchase my baggage ahead of the me while checking in online so I just paid for it once I got to the airport."

Pros: "On time departure Landed earlier than expected"
Cons: "Disappointed alcohol was not complimentary like all my previous international flights."

Pros: "Great crew, comfortable seats although was unable to choose seats prior to check in."
Cons: "Got charged for bags when we had booked regular economy class, NOT economy “light”. Was told the baggage policy changed since we booked - TOTAL BS! Also, c’mon, give us ONE free beer on a 7 hour flight."

Pros: "My headline says it all. I am a regular user of Icelandair."
Cons: "I never like it when the person in front pushes bac their seat squishing me and putting the screen on the back of their seat too close to my face, but this is true of all sidelined. They should make seats unmovable, or make everyone lie back!!"

Pros: "The overall mediocre entertainment was the best part."
Cons: "Bag drop took 75 minutes waiting in a line with minimal signage. The middle seat is not designed to accommodate a small backpack, let alone, my tiny, size 5 feet. There are no snacks provided (7.5 hour flight) and NO refills on WATER!!"

Pros: "The flight was smooth and the service was great."
Cons: "Nothing to complain about"

Cons: "Surprised by very large bag fees, reservation was unclear about baggage allowance and charges."

Pros: "Price"
Cons: "Flight was canceled due to strike in Iceland, and Iceland Air offered NO COMPENSATION. We were stranded in the Denver Airport for two days with kids, but our dog was not brought back to us during that time. We were finally re-routed via another airline."

Cons: "I thought there would be an on flight meal with the international flight."

Pros: "Comfortable planes, nice crew, great pilots"
Cons: "No food served"

Cons: "At the airport in Iceland we had to go downstairs after we deplaned and then come back up to check in again. No alternative to stairs was offered."

Pros: "Clean. Good service. Just way better than most domestic flights in recent memory."

Cons: "Never flee international without getting a free meal before. Pretty sad. Plus, they charged for earphonestoo. Ridiculous."

Pros: "Nice people, efficient, Good coordination of flights in Reyjavik."
Cons: "Food and seats. All airline seats are made for very tiny people. I was cramped and I'm not fat."

Pros: "On time, good service, quick boarding. Overall very good experience."

Cons: "To whom it may concern, In the last week I have flown Iceland Air three times. In fact had it been up to me, the first time would have been the last. But due to family traveling, our plans were set. So listed below is the detailed description of my horrible travels with your airline as well as all the added expenses it cost me. Due to all of the misshaps with Iceland air I have had in the last couple weeks, I made sure on my returning flight to check in and pick the seats for myself and the family member I was traveling with for my returning flight from Gatwick to Iceland. However when we got the gate, my ticket dinged because they had moved my seat from next to my family to the back of the plane, because they over booked the flight. This has been a disaster only because of this airline. Next time I plan on using British airways, the flight I took with them was amazing and effortless on my part!"

Cons: "Lack of food for a 7hr flight"

Pros: "Crew was nice"
Cons: "Tight fit...herded like cattle in Iceland...barely made my connecting flight. No one available to give info on where to go or why we were delayed. Oh...and seven hour flight...no food. But pretty sunset"

Cons: "Are you serious? I fly to Europe, and the bag doesn't even make it out of Iceland? In fact, dozens of people didn't get their bags? They never put them on the plane? How does this happen? I am in London meeting with clients... and all I have is a sweatsuit. I don't have time to go buy new clothes, so I will look like an idiot in front of my boss and our clients. Thanks a lot Icelandair."

Cons: "3 hour delay from Denver translated into a 6 hour delay to my final destination. Food on board is expensive, even when other airlines offer food in their ticket prices. Very likely will not fly on Iceland Air again."

Pros: "I liked how small the airport was in Iceland no freaking out when your plane lands and your connection is already boarding"
Cons: "There was no meal provided which was a bit of a surprise for an international flight.."

Pros: "Best airplane experience I've ever had! Great airline!"

Pros: "Non stop great service"
Cons: "Nothing"

Pros: "I liked the in flight movie selection."
Cons: "There were so many things wrong with our flight from Gatwick to NYC. The check in staff were rude and homophobic at check in, forcing my partner and I to separate for check in while we watched heterosexual partners check in together freely. The disabled toilet alarm broke as we descended into NYC and we listened to end-of-the-world death sirens as we were landing. It was not communicates that food was a microtransaction on flight and was so overpriced so we went nearly 13 hours without food because the flights were also delayed on the tarmac. The de-icing tow truck in Iceland was broken down so we were delayed two hours on the layover. On return, both Icelandair gates opened late. During the layover we were kettled in hot container units before 20 min before being bussed to the plane and held for 15 minutes. Then, the icing on the cake was landing back at Gatwick and seeing my brand new luggage I bought on the trip damaged with thr back pocked ripped out along the bottom seam. I will never again ride with these rude, price-gouging, apathetic amateurs."

Pros: "Quick, efficieny, comfy and they really treat the kids well."
Cons: "Delayed baggage reclaim at Gatwick and long immigration lines."

Pros: "The price of the business class ticket was good and it allowed a stopover in Iceland at no extra cost."
Cons: "The flight was held for 30 minutes to accommodate another arriving flight, This caused me to rush in London. I flew Saga class, but the crew stayed in the kitchen, did not help to put up luggage, welcome us on board. They gave us a plastic bottle of water. There was no choice on the menu. The tray was put in front of you. There was no drink or snack upon boarding. Other than putting the tray in front of you and collecting it, the flight crew stayed in the kitchen. There was no interaction. There was nothing special about the comfort, entertainment or food. Also I like to see the flight path, but that was not available."

Pros: "Very comfortable seat in row 5"

Pros: "Finally getting off of Icelandair for good that day."
Cons: "See above."

Pros: "There were blankets. It was cool enough in cabin"
Cons: "Boarding was very difficult, exit a bus and no order to enter plane, lots of problems with people going in wrong direction and very narrow isle to try and cross paths. Very unorganized. Flight was delayed."

Cons: "They dont offer a meal for free."

Cons: "My wife's bag did not make the plane from KEF to AMS. Still hasn't arrived 30 hours later."

Cons: "Depending on the seat you get (aisle, middle, or window) you either can or cannot fit anything under the seat in front of you. Each seat has different space. What I usually take wouldn't fit anywhere but the window. The middle seat space is USELESS as there is something installed that MAY give you about 6 inches from floor to it. The aisle seat's forward under space is a cube shape, so typical carry-ons won't fit there either. As I slept the whole way to Reykyavik, I don't know much about the service. The under seat space may lead me to not booking Icelandair again."

Pros: "Icelandair is great because your connection waits for you even if your flight is late."

Pros: "The crew was nice and it was nice that they gave my 8 year old son an activity bag and free meals. The entertainment center was great. The flight was on time and everything seemed to run smoothly."
Cons: "It felt like a domestic flight in that there wasn't a lot of extra space and we had to pay for everything (food, snacks, headphones, wifi) aside from soft drinks."

Cons: "No blankets and the temp in the plane was freezing. Possibly this is only for this specific flight, very little info on delay and almost no info on what was going on."

Cons: "Arrived late."

Pros: "Excellent service and exceptionally clean planes!"

Cons: "Meals on menu were not available."

Pros: "I enjoyed everything about my experience with Icelandair. I am going to be flying into London through them for now on and hopefully on an annual basis!"

Cons: "The movies were all old, no new variety. They refused to let us take our bag on to the plane even though it fit in their provided sample bin and made us check it at the gate. There was plenty of room on the plane bins and several bigger backpacks than our small duffle bag! This caused us a lot of extra time spent upon arrival waiting for it"

Cons: "you cancelled my flight, no more Iceland air for us, we had to cancel our entire vacation."

Cons: "never again"

Pros: "-This was the first time flying with Icelandair and will definately fly with you again. Hot coffee was very good and so was the Yogart."
Cons: "Not having a meal available. Next time I will know to pack a sandwich."

Pros: "Folks were friendly and efficient."
Cons: "Not enough space"

Pros: "I appreciated the fact that we were able to fly out despite there being a major snow storm and closed airport just hours before our takeoff. We also appreciated being able to switch our connection flight fairly easily once we knew we would be delayed. The staff was very kind and since we had a longer layover in Keflavik, we were very grateful for the food vouchers to used in the airport while we waited."
Cons: "The airline wouldn't make a decision about whether or not the plane would be flying out on time or be delayed until about an hour before our original boarding time. Seeing as the airport and only road getting to the airport were closed, it seems like they would have been able to make that decision and alert all passengers much sooner. We kept calling in to check on the flight status and they said we would receive texts and emails with any changes, but I never did."

Pros: "Huge snowstorm in Denver caused the airport to shut down. Plane left about 5 hours late. We missed our connection and even though it wasn't Icelandic Air's fault they gave me a taxi, a room and three meals until I caught my connecting flight the next day. Amazing service."

Pros: "Comfortable seat and enjoyed movie/TV selection."

Pros: "I liked the professionalism of the crew, the comfort of the seating, and the blankets. I found the safety briefing very creative and entertaining."
Cons: "I did not like having to pay for snacks or the fact that our row could not access the flightpath on our screens. I also was most annoyed by the passenger behind me who seemed not to know that her tapping fingers on the screen in front of her were actually tapping the back of my head as I tried to sleep. Perhaps airlines could remind passengers that what they do to the seat in front of them affects the occupants of those seats?"

Pros: "Everything was on time. The Airplane had plenty of entertainment and comfort. The long trip felt fast."
Cons: "N/A"

Cons: "When you book BA and end up with Iberia, that’s definitely not what you want..."

Cons: "My checked bag did not make it to London, and it’s really affected my short stay which requires a lot of traveling around England."

Cons: "Missed my transfer in London because the plane took too long to unboard and I was unable to make it to the gates of my next flight in time, despite there being over an hour connection time. The flight came in slightly late and passports were re-inspected upon unboarding which wasted a lot of time, and Heathrow is a nightmare of an airport on a good day, which made it very difficult to get where I needed to go."

Cons: "This flight was cancelled"

Pros: "The aircraft comfort"
Cons: "Do the checking before not 15 min before the departure"

Cons: "Delayed by an hour due to inbound delay, causing a knock-on delay with plane maintenance. While fairly comfortably seated and offered water, this still was somewhat unpleasant especially after a long-haul from Havana"

Pros: "Not a lot."
Cons: "Arriving at the gate whilst the flight was still boarding, with a boarding pass in my hand, and being told that my seat had been given to someone else because the Airline unilaterally decided that my connecting flight from Bogotá would not arrive in time. Followed by two hours of Iberia staff being surly, not looking me in they eye and doing absolutely nothing about getting me home. I have now been travelling for nearly 30 hours without sleep, am stuck in Madrid with no certainty of when or how I will get home or see my luggage again, and am seriously seriously pissed off. I do accept that things can sometimes go wrong and that it is nobody’s fault. This is definitely somebody’s fault."

Pros: "Every thing was ok"
Cons: "N/A"

Pros: "The food was nice."
Cons: "There was no water in business class toilets. The staff are not polite."

Cons: "I was not able to check in online"

Pros: "The screens on a dozen seats just failed a few hours in - engineering issue. And breakfast was a cold pretzel. Food gets let’s generous on BA all the time. The crew were lovely."
Cons: "A 2330 Flight ran significantly late with a passenger delay and then de-icing. The repeated assurances of “a 10 minute or so delay” were obviously not correct. Takeoff close to 0100 was followed by drinks AND then food - my vote would be neither. Please oh please just let us sleep."

Pros: "Madrid's airport is comfortable and modern."
Cons: "Unless you paid you do not even get a seat assigned until you get to the airport. No food or even drink unless you pay."

Pros: "Excellent service"

Cons: "Seating and not so friendly"

Pros: "Heathrow Airport has a lot of stores to keep you occupied"
Cons: "Late notice of where our gate was located. By the time we got the news, we went to our gate and the people were already boarding"

Pros: "I like the staff and the generous host of them"
Cons: "The price was not matching the benefits of the ticket because it was without check in bag (luggage) and every single thing you have to pay The type of aircraft there are using its too small business class is very poor nothing to compare with other company."

Pros: "Crew was nice and I had a great flight with Iberia on my flight from Chicago to Madrid"
Cons: "I am 6 feet 180 pounds and I had absolutely no legroom was completely stuck in my seat can’t believe that a tourist class seat is this small with no legroom"

Pros: "That I arrived"
Cons: "Iberia flight was delayed by 45 minutes causing me to miss my connection from London to Dublin."

Pros: "Airbus 320"
Cons: "Boarding process and pitiful legroom space . Iberia clearly loves showing the privileged few who have paid top dollars to be at the front , that we must be made to wait and struggle to get to our seats .Then, we have to squeeze into a tiny , pitiful space of a seat .....Even Ryanair does better !"

Pros: "seat is comfort"

Pros: "Flight was safe, aircraft was clean and luckily with enough room under the seat to store carry on bag"
Cons: "The fact that all the passengers boarding in "group 3" were forced to check in their carry-on bags if they did not fit under the seat; and retrieve those at the baggage claim area (not right after exiting the airplane) In my case I was able to store my carryon under the seat in front of me after pleading to the crew and gate members to let me try because of my connecting flights. There is no complimentary food service, even water is charged."

Cons: "I stopped at the Iberia check-in at Barajas in Madrid. They sent me to BA check-in, where I waited 45 minutes to find out that I should be at Iberia check-in. Then, Iberia check-in had to send me to last minute clerk or I would have missed my flight. Last minute check-in ended up being the same place and same clerk I began with."

Cons: "A porter checked our bags at the gate without asking us whether we were traveling beyond London, so the bags were never transferred to the transatlantic flight nor did they arrive in SF. It wasn't necessary to check them because there was plenty of room in the overhead bins when we got on the flight. We immediately asked a flight attendant to help when I realized they might not go through and he said he spoke to someone who caught and tagged the bags to go through, but it still didn't happen. It would have been easier if he had just brought them to us on the plane. Another women's bag was taken with all her baby supplies and bottles in it for a 16-hour travel day. Very frustrating for all of us."

Cons: "Mistake Kayak or its subcontractor made in listing the name of my wife incorrectly. This created a real hassle in getting a boarding pass in her name"

Pros: "short flight, on time"
Cons: "indifferent crew"

Pros: "The flight was short"
Cons: "They didn't even give out water on the flight. Not to happy with the service"

Cons: "There was no complimentary water or beverages"

Cons: "Very pleased with overall service and hospitality"

Pros: "Flight on time"
Cons: "Check in was terrible, did no allow online and on the desk a lot of misinformation which sent me to different desks for check in. Personnel Needs training!!l"

Cons: "Upon boarding the aircraft was really hot, I was sweating in my seat... I did not receive any complementary drinks or snacks."

Pros: "Movies, no delays"
Cons: "Luggage was not documented correctly to my final destination by Iberia"

Cons: "Very limited room to move. Rather impersonal"

Pros: "Comfortable flights & on time"
Cons: "Service, flight crew seemed to busy chatting instead of serving."

Pros: "Nothing"
Cons: "They forced us to check our bags at the gate even though we had an international connection to make in London--to continue flying to Chicago. As a result, we had to go through customs and security in London, and would have most definitely missed our connecting flight back home to the States if not for a woman in customs at Heathrow who let us cut to the front of the line. I will never fly Iberia again and will be lodging a formal complaint."

Pros: "Nothing"
Cons: "No free snacks or drinks"

Pros: "Easy check in and comfortable seats"

Cons: "Too little time to connect with another flight at Heathrow. Missed my connecting flight. Why is there an additional security checkpoint at Heathrow when you've already been thru security at another airport? Poor design for international arrivals."

Pros: "The ease at putting my luggage in.."
Cons: "The prices of the food and drinks!! Ripped off!!"

Pros: "Short 2 hour hop to Heathrow, adequate seating, nothing challenging about this flight. Barcelona airport is very user friendly, open and expansive. Service was good on the flight."
Cons: "Landed at heathrow, which is a sprawling airport and plenty of time required for the endless walking, bussing, and subway connections between terminals and gates. But efficient."

Pros: "We were overall very pleased with everything about, thank you!"

Pros: "The crew was fabulous! And the ride was on time and had plenty of entertainment."
Cons: "My only complaint is that the seats were very tight in the economy class. We were packed like cattle. I know these were the "cheap" seats but for almost $1500 I would hope for a bit more comfort."

Pros: "Nothing"
Cons: "Kept us waiting for five hours"

Cons: "Late departure."

Pros: "Guests were boarded quickly. Crew was friendly."
Cons: "Food was tasteless and bland. Crew was not very attentive."

Cons: "The seat did not recline, a bit ridiculous for a plane that size"

Cons: "The fight from Chicago to London was a nightmare."

Pros: "Loved the gluten free meal option."

Pros: "Spaciousness of aircraft, comfort of aircraft (vibration, noise)"

Cons: "not enough leg room. and i have to point out that I am a petite 110 lbs, 5'2" woman. although the flight is short, a complimentary snack and drink would have been nice. instead, you had to pay for anything you wanted. prices on top of that, were exaggerated. very disappointing."

Pros: "The flight from Raleigh to Heathrow London was LONG, so I especially enjoyed the wine being included without extra cost! Wine helped me to relax, read, & survive the long sleepless night!"

Pros: "Crew were great..."
Cons: "Food was very poor. Entertainment was awful"

Pros: "Ability to plug into a movie or music and go to sleep"
Cons: "Not being woke up to find out if I want something to eat or drink. Aisle seat and i was being knocked a lot. I had been up over 30 hours and was exhausted."

Cons: "Timeliness"

Pros: "Not much"
Cons: "Stewardess never smiled once! She was approx age 45 and should know by now how to be professional. Not the start to a vacation anyone would want."

Pros: "It arrived on time."
Cons: "The temperature in the cabin was way too cold. People we wearing their jackets and when I mentioned it to the cabin crew member she said a few other people would have to make a similar comment before she could request turning the temperature up. There was also a glitch in the system so that the reading lights for each seat could only be operated by the seat directly in front. The food was very uninspiring and poorly presented. The tea and coffee were awful!!!!!! The choice of movies,etc was very limited. Thank goodness it was a night flight and not too long!"

Pros: "Nice comfortable flight, has good entertainment program. Uncomplicated easy boarding."
Cons: "Food for 9 h wish to be better: dinner was cold (you could feel that chicken was warmed in microwave, but pasta was just taken from fridge), breakfast was pathetic. In last seats to many overhead compartments was secured for equipment or occupied by crew"

Pros: "The zone system seems to work well for boarding and the cabin crew on my flight to London were superb, helpful and polite to myself and others, despite a few impatient passengers."

Cons: "JustFly did not release my coupon to Lufthansa or Air Canada, and so I was nearly prevented from flying."

Cons: "Was put on a Turkish airlines flight - landed in India 12 hours AFTER scheduled landing. My luggage did not reach India. After numerous calls got only 1 out of 2 of my bags ; 2nd bag still missing 1 week after landing in India WOW"

Pros: "The flight was on time check in was simple and quick Staff on board friendly and professional Inflight movies fab Plenty of room on seats clean plane"
Cons: "Nothing all great"

Pros: "Getting off"
Cons: "Sore all over and a lousy cough"

Pros: "Entertainment"
Cons: "My seat was wet and i had to wait quite a while for it to be rectified. I asked to sit on a crew seat at the back of the plane and was told that i would break it. I found this rather disgusting . Seating plan is very crammed like sardines"

Cons: "The ticket was not valid...had to buy a new ticket"

Cons: "I bought my ticket with Air Canadafrom Vancouver to Calgary then connected with Lufthansa from Calgary to London UK. Unknown to me I could not find the flight because it had been changed to an AC reference flight. With a very short time for the connection I did not know where to get my boarding pass as my flight with Lufthansa was nowhere referred to ! Not which gate to go . Why not put it in the ticket that Lufthansa and Air Canada work together and that both flights ref should show !! It would avoid a great deal of anxiety . Only offered 1 round if hot drinks over 9 hours ! Departure delayed by nearly 60 minutes"

Pros: "On time"

Pros: "Will use again"
Cons: "Airline food has always been poor no matter which airline you travel. Be more liberal with the drinks trolley."

Pros: "Ease of service and efficiency."

Pros: "everything"
Cons: "few movies"

Pros: "1 stewardess was great"
Cons: "Flights were delayed. Did not check boarding passes which was scary."

Pros: "Excellent value for Economy flight"

Cons: "Seats are uncomfortable. I pre ordered vegetarian meal, but I guess they did not bother."

Pros: "Staff all friendly and helpful, both at desk and in plane. Seats were pretty comfortable with sufficient leg room (I am tall), but if you are a wide person (or next to one) it would have been pretty cramped. Neither of my flights (to Newfoundland) were full so we all had a bit of extra space. Food was adequate but could be improved with fruit instead of dessert."

Pros: "The plane took off and landed on time."
Cons: "The food was terrible and the staff were in there own world and not particularly polite. Hand luggage was not managed so the bins were rammed. Some people had 3 pieces of large hand luggage. Food was the worse I have had on any flight. I would rather pay and have something edible. On 2 of my 3 flights the staff were so wrapped up in there own life's, they did not manage to finish the safety checks before taking there seat. Overall a poor experience."

Pros: "Air Canada's business seat is one of the best out there, and the crew on this flight was super friendly. Extra props to the service director, Joseph."
Cons: "Boarding was slow for business class joining after zone 2 announced. Despite being parked at a gate with two jetbridges, only one was used. AC could use a refresh on its entertainment selection - hasn't changed much over the summer."

Cons: "Rather than notify the passengers that our flight would be delayed prior to our arrival at the airport, we waited at the gate for several hours."

Pros: "Everything. The plane was immaculate, the seats were comfortable, the food was delicious, the flight crew was friendly and professional. Air Canada's abillity to transit passengers from the US to international destinations is truly remarkable and must be best in class. I went from an inbound flight from Houston, through Immigration and to the gate for my flight to London in under 15 minutes!"
Cons: "Nothing."

Pros: "Great gluten free meal. Calling ahead of time to order was well worth it."

Cons: "See above."

Pros: "Good breakfast."
Cons: "Cabin was cool"

Cons: "4 hour departure delay"

Pros: "Onboard attendants were pleasant"
Cons: "No apology for lateness, flight boarded late, took off 40 min late, arrived 35 minutes late but we sat at gate waiting for someone to open it ?!, then another 15 min before bags started to unload Ridiculous but indicative of airlines You are not their valued guest or even their customer, you are a problem that needs to be solved and are consequently met with preloaded annoyance and a readiness to dismiss, placate at the best of times but definitely not please, impress, sympathize or satisfy. There is no evidence that it's even in their lexicon- not a part of their recruitment or selection process or training, ever! They're main focus and only positivity is saved for themselves. There may be a long line of concerned and anxious travelers but their priority is getting coffees for the battle ahead! They break their focused indifference only for each other and enthusiastically leave their post to satisfy each other's needs and attention. This has got to change! Why do we put up with such awful service for which we are the paying customer? Why are we, their customers, not valued? This airline makes record profits, provides less, charges for everything and increasingly delivers bad service, sometimes offensively bad! It doesn't cost more to hire a customer centric pleasant person, or incorporate guest experience into training or at the very least be friendly and smile! What if an airline just did that?! They'd differentiate themselves and develop a positive customer centered culture. Don't we deserve that, at the very least?!"

Pros: "Friendly efficient staff"
Cons: "The plane was a bit dated so the seats were smaller the Luthansa"

Cons: "Flight was delayed multiple times. Was tracking boarding from the Air Canada app as there was nowhere to sit by the departure gate or screens. The app didn't advise that the flight was boarding (unlike other apps such as BA). I missed my flight and they insisted on charging me more than what I paid for the entire ticket just to return home. I got back to London to find that my luggage didn't make the journey. Staff at Air Canada were unfriendly and unprofessional."

Pros: "Staff were friendly"
Cons: "Seats were narrow and sitting in aisle seat you were constantly hit every time cabin crew took trolley up / down aisle. Woke up by cabin crew banging into me."

Pros: "Online booking,boardong pass, alerts"

Pros: "tout était bien - very good"
Cons: "all was good"

Pros: "Boarding was efficient, crew were attentive, food was excellent, the "pod" was comfortable and I did not use the entertainment"
Cons: "Would have liked more info as to how to work the gizmos - had to ask how to recline my seat and never did get to grips with the entertainment. The Fast Pass specificaly said it was for disembarkation at London and so I did not realise I could have used it to get through security for ongoing flight"

Pros: "Everything was ok."

Cons: "Horrible to say the least"

Pros: "Smooth"

Pros: "The seat"
Cons: "1h30 delay once boarded The braeckfast which un fact consisted un only à slice of banana cake."

Pros: "Treatment to old passengers"
Cons: "Hardly nothing except my baggage had been damaged on handling. Some redress is welcome with thanks"

Pros: "The plane, which was American-made. Smooth ride in the air, no baggage issues."
Cons: "The crying children in front of me, the hour and a half delay, and the late dinner service. Dinner came at 8:30, after staring at those with special meals eat and finish an hour before everyone else, they should wait with the rest of us. Breakfast was pretty lackluster. Their online app and check in is awful- they should hire new coders and UX designers to increase functionality."

Cons: "No monitoring of travel route"

Pros: "Everything went smoothly. Everyone was pleasant and respectful."

Cons: "Was put on plane to France, 5 hour layover. Still waiting for my luggage to arrive. Frustrating in extreme."

Pros: "Arriving early Leaving on time"

Cons: "Bread dry and no choice . Fresh fruit would be refreshing"

Cons: "Like riding in the back seat of a corvette."

Pros: "crew was nice"
Cons: "food, no warm towels"

Read more about WestJet
COVID-19 information

Safety measures for airlines flying from Denver to the United Kingdom

Airlines flying from Denver to the United Kingdom have enacted additional safety measures and adjusted policies to better accommodate travelers. Policies vary by airline.

Heightened sanitation

Daily cleaning, installation of cabin HEPA filters on flights from Denver to the United Kingdom

Mandatory masks

Masks required on board, masks provided on flights from Denver to the United Kingdom

Social distancing seating

Middle seats unavailable to book on flights from Denver to the United Kingdom

Pre-flight testing

Testing for antibodies, testing for symptoms for flights from Denver to the United Kingdom

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